Move SettingsLib icons to android.

Bug: 122263617
Test: make
Change-Id: Ia2ab06561824656951fbd0019e9c921442c714e1

res/drawable/ic_expand.xml

@@ -19,6 +19,6 @@
 
     <item android:state_checked="true" android:drawable="@drawable/ic_expand_less" />
 
-    <item android:drawable="@drawable/ic_expand_more" />
+    <item android:drawable="@*android:drawable/ic_expand_more" />
 
 </selector>

res/drawable/ic_expand_more.xml

@@ -1,30 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-     Copyright (C) 2015 The Android Open Source Project
-
-     Licensed under the Apache License, Version 2.0 (the "License");
-     you may not use this file except in compliance with the License.
-     You may obtain a copy of the License at
-
-          http://www.apache.org/licenses/LICENSE-2.0
-
-     Unless required by applicable law or agreed to in writing, software
-     distributed under the License is distributed on an "AS IS" BASIS,
-     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-     See the License for the specific language governing permissions and
-     limitations under the License.
--->
-
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="24"
-    android:viewportHeight="24"
-    android:tint="?android:attr/colorControlNormal">
-
-    <path
-        android:fillColor="#000000"
-        android:pathData="M8.12 9.29L12 13.17l3.88-3.88a.996 .996 0 1 1 1.41 1.41l-4.59 4.59a.996 .996 0 0
-1-1.41 0L6.7 10.7a.996 .996 0 0 1 0-1.41c.39-.38 1.03-.39 1.42 0z" />
-
-</vector>